Collector main valve assembly



Jam my w36., C, V, MONTRE l www@ COLLECTOR MAIN VALVE ASSEMBLY Filed Aug. l1, 1932 Patented Jan. 4, 1936 UNITED STATES y PATENT orrics COLLECTOR MAIN VALVE ASSEMBLY York Application August 11, 1932, Serial No. 628,343

Claims.

This invention relates to improvements in apparatus for the recovery of by-products from coal distillationand is especially directed to a new and improved device for shutting off the flow of 5 gas between ovens or coking chambers of a coal distillation plant and the collecting main.

In accordance with the present invention the uptake pipe or standpipe of the coal distillation chamber isv provided with a connection with the gases into. one side of the collecting main and provides a water seal for preventing flow of gases through this connection while the coking chambers are being charged.

It is an object of the invention to provide a lower type of goose-neck construction than that customarily employed so that the top may be placed within easy reach of the operator, making possible more convenient operation and less laborious cleaning and maintenance of this part of the structure.

A further object of the invention is to make possible the utilization of simple castings for the uptake pipe and liquid seal assembly.

A still further object is to provide a simple and efficient liquid seal assembly which will operate satisfactorily under the severe operating conditions to which such a structure is subjected and which will not require frequent attention.

In accordance with the present invention the liquid seal assembly may be welded or otherwise secured to one side of the collecting main. This assembly comprises a hood extending downwardly within the collecting main and a basin directly beneath the hood and having a lip surrounding the hood in such a manner that when lled with liquid it provides in cooperation with the hood a liquid seal between the collecting main and the conduit leading to the oven or retort. The basin is 'provided with eicient valve means which permits the ready removal of liquid therefrom to break the seal and permit` flow of gas into the collector main. The valve is constructed and arranged so as to be substantially completely out of the path of flow of the hot gases and be less subject to practical operating difculties than apparatus oi previously known design. Provision is made for the effective flushing of the uptake pipe and liquid seal equipment by means of spray heads suitably arranged.

In the drawing:

Fig. 1 is a vertical section through an uptake pipe and collector main assembly constructed in accordance with my invention.

collecting main which permits the introduction of Fig. 2 is a sectional elevation on line 2--2 of Fig. 1.

In the illustrated embodiment of my invention numeral I designates the uptake pipe of a coking chamber of a coke oven battery (not 5 shown). Connected with the uptake pipe I there is provided a goose neck member 2 having a flange 3 at the end remote from the uptake pipe, the flanged portion being connected with the relatively short vertically extending portion leading 10 from the uptake pipe by a substantially horizontally extending portion. The collector main l is provided, on one of the vertical walls 5 beneath the top thereof, with an inwardly extending arcuate shaped hood 6 and directly beneath 15 the hood 6 with an arcuate shaped basin 'I having an upwardly extending lip 8. The basin l is so positioned beneath the hood 6 that when filled with liquid it provides a liquid seal for the opening beneath the hood 6 and when the seal is 20 broken gas may escape from the front and both sides of basin 1 into the collector main. The hood 6 and basin 'I may be a single unitary casting which is adapted to t within aperture 9 in the wall 5. This casting may be provided with 25 an outer flange I0 adapted to form a union with the flange 3 of the goose-neck member 2. The casting may be provided with stilfening ribs I I to overcome any tendency to warp due to the intense heat to which the apparatus may be sub- 30 jected.

The basin or underlip 'l may be suitably provided with a valve for controlling the cw of liquid therefrom. The valve illustrated in the drawing and constituting the preferred embodi- 35 ment of my invention comprises a valve cylinder or seat I2 beneath the basin 'I and cast integrally therewith. The valve cylinder l2 has a longitudinal opening I3 communicating with the upper side of the basin 'l so that liquid may drain from 40 the basin into the cylinder I2. On its lower side the cylinder I2 is provided with a second longitudinal opening I4 to permit liquid to flow from the cylinder into the collector main.

Within the valve cylinder I2 there is provided 45 a rotatable valve closure or stem I5 of generally cylindrical contour and having a semi-cylindrical cut out portion IS. The valve closure is adapted, when positioned as shown in the drawing, to close the opening I3 to prevent the flow of 50 liquid from the shelf 'l to the valve cylinder I2. When the valve vgate is rotated axially a quarter turn counterclockwise, from the View shown in Fig. 2, the cut-away portion of the valve gate or stem permits the passage of liquid through the opening I3 to the cylinder I2 and from the cylinder I2 through opening III to the collector main, The valve gate I5 in cylinder I2 may be provided with a thrust bearing I1 at one end thereof. In the embodiment of the invention illustrated, the valve gate I5 is provided with an operating shaft I8 which is loosely connected to it by means of a tongue I9 engaged by the projections 20 on the shaft I8. A shoulder 2| is provided on this shaft to constitute a thrust bearing to prevent the valve from Working out of the valve cylinder, the shoulder 2| bearing against the packing 22 of a packing gland 23. A crank 24, engaging shaft I8 in any suitable manner, may be provided for rotating the valve member I5. The valve member I5 and its operating shaft I8 may, if desired, be made in a single unit. They are, however, shown as two pieces in the preferred embodiment of this invention so that they may be readily removed without interference by the adjacent uptake pipe.

A spray head 25 is located within the conduit or goose-neck 2 and is adapted to continuously project a liquid spray against the interior surfaces of the conduit and of the hood 6. The liquid from this spray collects a bowl 1 when valve stem I5 is in closed position forming a liquid seal. To break this seal and thus permit flow of gas into the collector main, it is only necessary to turn valve stem I5 into position so that openings I4 and I3 are in communication with each other through cut-out portion I6.

Additional spray heads 26 and 21 may be prov vided in the collector main and may be so located that they will project a spray of liquid against the outer surface of the hood 6 within the collector main and also against the surfaces of the basin or underlip 1 which are in contact with the hot gases in the collector main. Hence the basin is supplied with liquid not only from sprays 25 but also from sprays 26 and 21. It is consequently rapidly filled whenever it is desired to establish the liquid seal to prevent flow of gas into collector main from the uptake pipe.

By properly locating the spray heads, all parts of the liquid seal assembly may be continually sprayed with cleaning or cooling iiuid and the accumulation and coking of pitch on these parts is thus prevented. The valve cylinder I2 is so constructed that at each operation of the valve gate the walls of the cylinder are cleaned; conse-` quently no substantial deposits of coke and pitch take place on this surface. However, a suitable clean-out door 28 is provided on conduit 2 for permitting access to the interior of the assembly in order to effect any cleaning or other work which may be necessary or desirable during th operation of the unit.

The shelf 1, it will be noted, projects within the collector main, and when the seal is broken, gas iiows from three sides of the shelf into the collector main. Hence the outlet capacity of the uptake pipe and connecting goose-neck member is sufficient to accommodate the gas generated in the coking or carbonizing chamber. In prior types of liquid sealed uptake pipes a baille was provided extending from the top ofy the discharge section of the uptake into a pocket disposed exteriorly of the collector main and adjacent thereto. Gas flowing through the discharge section of the uptake was discharged therefrom in but one direction o-f flow into the collector main and not from three sides as in the invention herein. Consequently, to provide the necessary space for vthe discharge opening large enough to accomodate the gas generated in the carbonizing chambers and the space for the pocket in which the liquid forming the liquid seal is collected, it was necessary to use a relatively tall uptake pipe the discharge end of which communicating with the collector main was of relatively large area in cross section. In counter distinction this invention permits the use of a much lower uptake pipe the discharge end of which in cross section is of relatively small area.

It will be further noted that the collector main has but a single opening through which the unitary casting of comparatively simple construction extends; consequently, this invention results in a simplification of the casting and collector main structure particularly as compared with prior constructions comprising collector mains having two openings with which the gas inlet and the liquid drain outlet of a rather complicated casting communicate.

It will be further noted that parts of valve I5 are disposed substantially out of contact with the gases flowing into the collector main; are continuously iiushed with liquor from sprays 25, 26, and 21, and when the liquid seal is formed, are immersed in the liquid constituting the seal. Thus the valve parts are effectively protected against the high temperatures prevailing in the uptake pipe and against the corrosive and erosive effects of the gases. Hence the effective life of the valve and uptake pipe assembly is prolonged.

While I have described quite specifically in detail the preferred embodiment of my invention, it is understood that various modifications may be made Without deviating from the invention as defined in the appended claims.

I claim:

1. In a gas collecting system for 'a coal distillation plant, a collecting main, a gas conduit leading laterally through a side wall of said collecting main and provided with a hood extending into the main, and a member within the main beneath said hood adapted to cooperate therewith to form a liquid seal for preventing flow of gas therethrough into the collecting main.

2. In a gas collecting system for a coal distillation plant, a collecting main, a gas conduit leading laterally through a side wall of said collecting main beneath the top thereof and provided with a hood extending into the main and a member within the main positioned beneath said hood, said member being of greater size than said hood so that a space is provided between said member and hood on three sides, means for introducing liquid into said member into which said hood projects for forming a liquid seal, and means for removing liquid therefrom to break the seal.

3. In .a gas collecting system for a coal distillation plant, in combination a collecting main, a short vertically extending gas conduit having a substantially horizontal portion leading into one side of said collecting main and provided with a hood extending into the main, a member within the main beneath said hood adapted to receive liquid into which said hood projects to form a liquid seal, a liquid outlet in said member, and means for controlling flow through said outlet.

4. In a gas collectingsystem for a coal distillation plant, in combination arcollecting main, a relatively short'vertically extending gas conduit having a substantially horizontal portion leading into one side of said collecting main and provided with a hood extending into the main,

a member within the main beneath said hood adapted to receive liquid into which said hood projects to form a liquid seal, a liquid outlet in said member, means for controlling ow through said outlet, comprising a rotatable valve member disposed in the base portion of said member out of substantial contact with the gas in the gas conduit when said member contains suliclent liquid to form said seal, adapted when in one position to close said outlet and when in another position to open said outlet.

5. In a gas collecting system for a coal distllation plant, a collecting main, a gas conduit leading laterally through a side wall of said collecting main and provided with an arcuate shaped hood extending into the main, an arcuate shaped member within the main beneath said hood arranged to hold liquid into which said hood projects to form a liquid seal said hood and member being open at three sides thereof to permit flow of gas into the collector main when the seal is broken, and means for flushing said hood.

6, A coal distillation plant gas collecting main having in a side wall thereof an aperture, a gas conduit extending laterally through said aperture into said collecting main and having an open end facing downwardly therein, and an underlip surrounding said open end and spaced therefrom and adapted to cooperate with the end of said conduit to form a liquid seal, said gas conduit and underlip extending into the conduit only suiciently so that three sides thereof are within the main.

7. A coal distillation plant gas collecting main having in one side thereof an aperture, a substantially horizontally extending gas conduit passing through said aperture into said collecting main and having an open end facing downwardly therein and an underlip within the main surrounding said open end and spaced therefrom and adapted to form a liquid seal therefor, a substantially horizontal valve cylinder on said underlip, having a longitudinal opening communicating with the upper side thereof and a second longitudinal opening communicating with the interior of the collecting main beneath said underlip, the cylinder thus providing a passage from the first longitudinal opening to the second longitudinal opening, a valve closure having a substantial portion of its surface cylindrical, said closure being rotatable within the cylinder so that it is adapted in one position to close the opening and in another position to permit the passage of liquid therethrough, and means located externally of said collecting main for rotating said closure.

8. A coal distillation plant gas collecting main having in one side thereof an aperture, a gas conduit extending laterally through said aperture into said collecting main and having an open end facing downwardly therein and an underlip within the main surrounding said open end and spaced therefrom and adapted to form a liquid seal therefor, means for spraying a liquid against surfaces of said conduit and means for supply- 5 ing liquid to said underlip, a substantially hori- Zontal valve cylinder on said underlip having a longitudinal opening communicating with the upper side thereof and a second longitudinal opening communicating with the interior of the collecting main therebelow, the cylinder thus providing a passage from the first longitudinal opening to the second longitudinal opening, a valve closure of substantially semi-cylindrical form, said closure being adapted to rotate axially in the valve cylinder so that it is adapted in one position to block the passage but in another position to permit the flow of liquid therethrough, a rotatable shaft extending externally of said collecting main and adapted to actuate said closure, and means for rotating said shaft.

9. In a coal distillation plant uptake pipecollecting main assembly, a gas conduit leading into the main and provided with a hood extending into the main and a member within the main beneath said hood arranged to contain a body of liquid for forming with said hood a liquid seal and having an elongated aperture through the bottom of said member for draining liquid therefrom into the bottom of the collector main, a rotatable member arranged so that -in one position it constitutes a closure for said aperture but when rotated to a second position it clears said aperture to permit drainage therethrough, means for rotating said member, Said means being located externally of said collecting main and out of contact With gases passing through the uptake pipe, and means for flushing said rotatable member when in said second position so as to avoid exposure thereof to direct contact with hot gases passing through the uptake pipe.

l0. In a gas collecting system for a coal distillation plant, a collecting main, a gas conduit leading laterally through a side wall of said collecting main and provided with a hood extending into the main, a member Within the main beneath said hood adapted to cooperate therewith to form a liquid seal for preventing flow of gas therethrough into the collecting main, a longitudinal opening providing communication between the space above said member and the space therebelow within said collecting main, and a valve closure having a substantial portion of its surface cylindrical, said closure being rotatable so that in one position it is adapted to block said longitudinal opening but in another position to permit ow of liquid therethrough.

CHARLES VERNON MCINTIRE. 

